Electric accumulator.



L. MARSEILLE & P. GOUIN.

EL'EGTRIG AGUUMULATOR- APPLICATION FILED JULY 1, 1909.

Patented June 7, 1910A I To all whom it .may concern.'

access/ 1.

ferries;

ELECTRIC aooiiiuiiiieron.

Specification of Letters Patent. l

Application meri July i, i909. serial n/50eme.

Be it kifownthat we, LON MARSEILLE, of Paris, France, and PAUL GroUiN, of Levallois- Perret, Seine, France, have invented certain new and useful Improvements in Electric Accumulators, which invention is fully set forth in the followingspecitication.

It is well known that thedroppiiig ot' the active material from alkaline accumulator Velements has a very detrimental effect upon l advantageif the alkalineV accumulator electrode is made as about to 'bedescribed with the' action of the accumulatore, shortening `their life' and `reducing` the difference of potential at discharge. Every precaution should therefore -be ta-ken to 'prevent the' .dropping out of the active material and, which is a further advaiitage, to constructelectrodes which willnot become distorted during the forming ot the element and under the action A.of charging and discharging. It

is known, for example', thatwhen a positive element is formed with hydroxids ot' nickel,- a considerable increase occursin thevoluine ot the active inaterial,andvthat' it the 'mal' -p'o'sit 'of sesquioxid of nickel by means of a l obte-ined. T hissesquioxid closesperfectly terial is not held in place by a Well devised mechanical arrangement, it will burst or distort its casing. v

According to the .present invention, in

order to prevent the dropping of. the active nl aterial, the 'exterior of the electrodes, -supports, pockets, perforated 'or ivover'i wire' tubes' or'lthelike, before' the Vsaine are filledl witlract'ive inateriah-i's provided with a desolution of nitrate'otnickcl, until a hard, adherent and porous layer of sesquioxid is the smallest.- interstices, orifices, etc., in the pockets or tubes and consequently prevents dropping of the active material without at the sanietinie introducingtoo much intei'nal resistance, this oXidv being' a suficiently goed conductor when anhydrous and suitably heated." This oxid layer niay be formechtor example, by plungingthe support into a concentrated solution ot nickel nitrate oi"` about 369 Baume rendered slightly acid and then passed into a furnace heated to about 600 C, to eect the torina- -tion of sesquioxid of nickel NigS. -c

cording to the .thickness desired this operation may be repeated niore or less times.

- which 2'.

vsions o, which are' hooked. and clamped together. '.Tlie tube may be made in any 'other Letters Patent is:;- i The process ot `treating accun'iulatoifsun- This method may be likewise ernplo'yed Patented June?, 1910. A

moreover for insoluble-'positive or' negative electrodes alone or concurrently with solublel capacity of the electrodes, itsA own 'capacity being add-ed to that ci the active material.

The objectsought is obtainedwith greater reference to the accompanying drawing, in

Figure l vis an elevation, Fig.l 2 a section, and Fig; 3 a plan of the skeleton ofthe electrode, Fig'. 4l is a magnied det-ail View showing'the oxid layer iii position.

The electrode is formed' of a 4perforated cy-` lindrical tube o of nickel or any other metal or alloy fullilling the sanie obiect. The tube' a is inadefroina sheet of, say, nickel perfo-v rated with a largenumber of holes of any desired shape and sizee` The' sheet is .bent into tubular for-mand its two edges brought -tlush togetherfto. enable thein to be kept in place. At top and bottom, the. ends ofthe sheet have nonhperforated tongues or extendesired way. A'double wireof nickel., iron,y

or the like 0, previously twisted together, is

wound in veryclose coils around the tube, so as to. forni a bracing .which will insure great' strength for the electrode. The. wire may of course be single, it desired or it maybe triple of any desired section, The two ends of the wire may be fixedunder the Vhooks or tongues o or securedv in any other Way. The tube4 process above described so as to close the.v

or inultipleand twisted together 'ori' not and Vthus prepared is oxidized according to the..

holes and theintersti'ces of .the-bracing with v sesquioxid of nickel f; l lt' is then illedwith positive or negative active material-kiand 'is 'closed at top and'bo'ttorn by ebonite plugs e' which are retained in place by bending over the edges ofthe tube.

What We olaiin and: desire 'tosecuie by ioo ports foi1 holding aetive maerizilv izo, prevent I signed our names this A22d day of J une 1909, dropping of said materia] therefrom, conin the presenoe of two subscribing Witnesses.

sist-ing in depositing on the exterioil of said LON MARSEILLE, support sesquioxid of nickel in the form of PAUL GOUIN,

5 a layer of hard adherent porous oxid for re Witnessesz taining said material. H. COKE,

l][n Witness whereof We have hereunto GABRIEL BELLIARD, 

